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    Sensitivity of Simulated Urban–Atmosphere Interactions in Oklahoma City to Urban Parameterization

    Source: Journal of Applied Meteorology and Climatology:;2017:;volume( 056 ):;issue: 005::page 1405
    Author:
    Reames, Larissa J.
    ,
    Stensrud, David J.
    DOI: 10.1175/JAMC-D-16-0223.1
    Publisher: American Meteorological Society
    Abstract: he world?s population is increasingly concentrated in large urban areas. Many observational and modeling studies have explored how these large, population-dense cities modify local and mesoscale atmospheric phenomena. These modeling studies often use an urban canopy model to parameterize urban surfaces. However, it is unclear whether this approach is appropriate for more suburban cities, such as those found in the Great Plains. Thus, the Weather Research and Forecasting Model was run for a week over Oklahoma City, Oklahoma, and results were compared with observations. Overall, four configurations were examined. Two simulations used the Noah LSM, one with all urban areas removed (CTRL), and the other with urban areas parameterized by a modified Noah land surface model with three urban categories (LSMMOD). Additional simulations utilized a single-layer urban canopy model (SLUCM) either with default urban fraction values (SLUCM1) or with urban fractions taken from the National Land Cover Database (SLUCM2). Results from the three urban runs compared favorably to high-density temperature observations of the urban heat island. The SLUCM1 run was the most realistic, although the urban fractions applied were the least representative of Oklahoma City. All urban runs also produced a drier and deeper planetary boundary layer over the city. The prediction of near-surface winds was most problematic, with the two SLUCM runs unable to correctly reproduce reduced wind speeds over the city. The modified Noah LSM provided best overall agreement with observations and represents a reasonable option for simulating the urban effects of more-suburban cities.
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      Sensitivity of Simulated Urban–Atmosphere Interactions in Oklahoma City to Urban Parameterization

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    contributor authorReames, Larissa J.
    contributor authorStensrud, David J.
    date accessioned2017-06-09T16:51:34Z
    date available2017-06-09T16:51:34Z
    date copyright2017/05/01
    date issued2017
    identifier issn1558-8424
    identifier otherams-75410.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4217743
    description abstracthe world?s population is increasingly concentrated in large urban areas. Many observational and modeling studies have explored how these large, population-dense cities modify local and mesoscale atmospheric phenomena. These modeling studies often use an urban canopy model to parameterize urban surfaces. However, it is unclear whether this approach is appropriate for more suburban cities, such as those found in the Great Plains. Thus, the Weather Research and Forecasting Model was run for a week over Oklahoma City, Oklahoma, and results were compared with observations. Overall, four configurations were examined. Two simulations used the Noah LSM, one with all urban areas removed (CTRL), and the other with urban areas parameterized by a modified Noah land surface model with three urban categories (LSMMOD). Additional simulations utilized a single-layer urban canopy model (SLUCM) either with default urban fraction values (SLUCM1) or with urban fractions taken from the National Land Cover Database (SLUCM2). Results from the three urban runs compared favorably to high-density temperature observations of the urban heat island. The SLUCM1 run was the most realistic, although the urban fractions applied were the least representative of Oklahoma City. All urban runs also produced a drier and deeper planetary boundary layer over the city. The prediction of near-surface winds was most problematic, with the two SLUCM runs unable to correctly reproduce reduced wind speeds over the city. The modified Noah LSM provided best overall agreement with observations and represents a reasonable option for simulating the urban effects of more-suburban cities.
    publisherAmerican Meteorological Society
    titleSensitivity of Simulated Urban–Atmosphere Interactions in Oklahoma City to Urban Parameterization
    typeJournal Paper
    journal volume56
    journal issue5
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/JAMC-D-16-0223.1
    journal fristpage1405
    journal lastpage1430
    treeJournal of Applied Meteorology and Climatology:;2017:;volume( 056 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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